Polonium tetrachloride
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Systematic IUPAC name
Polonium tetrachloride
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3D model (JSmol)
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| Properties | |
| PoCl4 | |
| Molar mass | 350.79 g/mol |
| Appearance | Bright yellow crystalline solid |
| Melting point | ≈ 300 °C (in chlorine) |
| Boiling point | 390 °C (734 °F; 663 K) |
| soluble, but rather slow hydrolysis | |
| Solubility | very soluble in hydrochloric acid and thionyl chloride, moderately soluble in ethanol and acetone, decomposes in dilute nitric acid |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Polonium tetrachloride (also known as polonium(IV) chloride) is a chemical compound with the formula PoCl4. It is a hygroscopic bright yellow crystalline solid at room temperature. Above 200 °C, it tends to decompose into polonium dichloride and excess chlorine, similar to selenium tetrachloride and tellurium tetrachloride.
Polonium tetrachloride is either monoclinic or triclinic.
Polonium tetrachloride is bright yellow at room temperature. At its melting point (300 °C), it becomes straw yellow, and at its boiling point (390 °C), it becomes scarlet. Its vapours are purple-brown until 500 °C, when they turn blue-green.
Polonium tetrachloride may be prepared by:
Polonium tetrachloride forms a complex with two moles of tributyl phosphate.
Like selenium tetrachloride and tellurium tetrachloride, polonium tetrachloride forms PoCl−
5 and PoCl2−
6 halogen complexes.
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